I. S. Muller, M. L. Bartelink, W. J. C. Grauw, H. J. M. Hooden, W. H. E. M. Gerwen and G. E. H. M. Rutten, “Foot Ulceration and Low Limb Amputation in Type 2 Diabetic Patients in Dutch Primary Health Care,” Diabetes Care, Vol. 25, No. 3, 2002, pp. 570-574.
 J.-Y. David, S. A. Jones and D. P. Giddens, “Modern Spectral Analysis Techniques for Blood Flow Velocity and Spectral Measurements with Pulsed Doppler Ultrasound,” IEEE Transactions on Biomedical Engineering, Vol. 38, No. 6, 1991, pp.589-596.
 C. Loewe, M. Schoder, T. Rand, U. Hoffmann, J. Sailer, T. Kos, J. Lammer and S. Thurnher, “Peripheral Vascular Occlusive Disease: Evaluation with Contrast-Enhanced Moving-Bed MR Angiography versus Digital Subtraction Angiography in 106 Patients,” American Journal of Roentgenology, Vol. 179, No. 4, 2002, pp. 1013-1021.
 O. Pablo Vasquez, M. Marco Munguia and B. Mandersson, “Arteriovenous Fistula Stenosis Detection Using Wavelets and Support Vector Machines,” 31st Annual International Conference of the IEEE EMBS, Mineapolis, 2-6 September 2009, pp. 1298-1301.
 M. Nitzan, A. Babchenko and B. Khonokh, “Very Low Frequency Variability in Arterial Blood Pressure and Blood Volume Pulse,” Medical & Biological Engineering & Computing, Vol. 37, No. 1, 1999, pp. 54-58.
 E. D. übeyli, D. Cvetkovic and I. Cosic, “AR Spectral Analysis Technique for Human PPG, ECG and EEG Signals,” Journal of Medical Systems, Vol. 32, No. 3, 2008, pp. 201-206.
 Y. M. Akay, M. Akay, W. Welkowitz, S. Lewkowicz and J. L. Semmlow, “Non Invasive Acoustical Detection of Coronary Artery Disease: A Comparative Study of Signal Processing Methods,” IEEE Transactions on Biomedical Engineering, Vol. 40, No. 6, 1993, pp. 571-578.
 J. Allen, “Photoplethysmography and Its Application in Clinical Physiological Measurement,” Physiological Measurement, Vol. 28, No. 3, 2007, pp. R1-R39.
 J. Allen and A. Murray, “Age-Related Changes in the Characteristics of the Photoplethysmographic Pulse Shape at Various Body Sites,” Physiological Measurement, Vol. 24, No. 2, 2003, pp. 297-307.
 R. Erts, J. Spigulis, I. Kukulis and M. Ozols, “Bilateral Photoplethysmography Studies of the Leg Arterial Stenosis,” Physiological Measurement, Vol. 26, No. 5, 2005, pp. 865-874.
 J. Allen and A. Murray, “Variability of Photoplethysmography Peripheral Pulse Measurements at the Ears, Thumbs, and Toes,” IEE Proceedings on Science, Measurement and Technology, Vol. 147, No. 6, 2000, pp. 403-407. http://dx.doi.org/10.1049/ip-smt:20000846
 P. A. Bonham, T. Kelechi, M. Mueller and J. Robison, “Are Toe Pressures Measured by a Portable Photo-Phlethysmograph Equivalent to Standard Laboratory Tests,” Journal of Wound, Ostomy and Continence Nurses Society, Vol. 37, No. 5, 2010, pp. 475-486.
 J. Allen, K. Overbeck, A. F. Nath, A. Murray and G. Stansby, “A Prospective Comparison of Bilateral Photoplethysmography versus the Ankle-Brachial Pressure Index for Detecting and Quantifying Lower Limb Peripheral Arterial Disease,” Journal of Vascular Surgery, Vol. 47, No. 4, 2008, pp. 794-802.
 C.-H. Lin, “Assessment of Bilateral Photoplethysmography for Lower Limb Peripheral Vascular Occlusive Disease Using Color Relation Analysis Classifier,” Computer Method and Program in Biomedicine, Vol. 103, No. 3, 2011, pp. 121-131.
 J. Allen, C. P. oates, T. A. Lees and A. Murray, “Photoplethysmography Detection of Lower Limb Peripheral Arterial Occlusive Disease: A Comparison of Pulse Timing, Amplitude and Shape Characteristics,” Physiological Measurement, Vol. 26, No. 5, 2005, pp. 811-821.
 M. Fallahpour, D. Megias and M. Ghanbari, “Reversible and Highcapacity Data Hiding in Medical Images,” IET Image Processing, Vol. 5, No. 2, 2011, pp. 190-197.
 D. M. Vázquez, J. J. Rubio and J. Pacheco, “A Characterization Framework for Epileptic Signals,” IET Image Processing, Vol. 6, No. 9, 2012, pp. 1227-1235.
 H. Heidrich, R. Wenk and P. Hesse, “Frequency of Asymptomatic Peripheral Arterial Disease in Patients Entering the Department of General and Internal Medicine of a General Care Hospital,” Vasa, Vol. 33, No. 2, 2004, pp. 63-67. http://dx.doi.org/10.1024/0301-15184.108.40.206
 A. Broadman, F. S. Schlindwein, A. P. Rocha and A. Leite, “A Study on the Optimum Order of Autoregressive Models for Heart Rate Variability,” Physiological Measurement, Vol. 23, 2002, pp. 324-336.
 K. Roth, I. Kauppinen, P. A. A. Esquef and V. Valimaki, “Frequency Warped Burg’s Method for AR-Modeling,” IEEE Workshop on Applications of Signal Processing to Audio and Acoustics, 19-22 October 2003, pp. 5-8.
 C. Collomb, “Linear Prediction and Levinson-Durbin Algorithm,” 2009.
 N. Kannathal, U. Rajendra Acharya, P. Joseph and E. Y. K. Ng, “Analysis of EEG Signals with and without Reflexology Using FFT and Auto Regressive Modeling Techniques,” Chinese Journal of Medicine, Vol. 1, No. 1, 2006, pp. 12-20.
 M. Akay, J. L. Semmlow, W. Welkowitz, M. D. Bauer and J. B. Kostis, “Detection of Coronary Occlusions Using Autoregressive Modeling of Diastolic Heart Sounds,” IEEE Transactions on Biomedical Engineering, Vol. 37, No. 4, 1990, pp. 366-373.
 S. B. Waluya and W. T. van Horssen, “On the Periodic Solutions of a Generalized Nonlinear Van der Pol Oscillator,” Journal of Sound and Vibration, Vol. 268, No. 1, 2003, pp. 209-215.
 Q. S. Bi, “Dynamical Analysis of Two Coupled Parametrically Excited Van der Pol Oscillators,” International Journal of Nonlinear Mechanics, Vol. 39, No. 1, 2004, pp. 33-54. http://dx.doi.org/10.1016/S0020-7462(02)00126-9
 G. M. Mahmoud and A. A. M. Farghaly, “Chaos Control of Chaotic Limit Cycles of Real and Complex Van der Pol Oscillators,” Chaos, Solitons and Fractals, Vol. 21, No. 4, 2004, pp. 915-924.
 Y. Abbas, J. Ann and A. Merna, “A Multistage Adomian Decomposition Method for Solving the Autonomous Van Der Pol System,” Australian Journal of Basic and Applied Sciences, Vol. 3, No. 4, 2009, pp. 4397-4407.
 Y. C. Du and C. H. Lin, “Adaptive Network-Based Fuzzy Inference System for Assessment of Lower Limb Peripheral Vascular Occlusive Disease,” Journal of Medical System, Vol. 36, No. 1, 2012, pp. 301-310.
 C. H. Lin, Y. F. Chen, Y. C. Du, J. X. Wu and T. S. Chen, “Chaos Synchronization Detector Combining Radial Basis Network for Estimation of Lower Limb Peripheral Vascular Occlusive Disease,” Lecture Notes in Computer Science, Vol. 6165, 2010, pp. 126-136.
 P. A. Bonham, T. Kelechi, M. Mueller and J. Robison, “Are Toe Pressures Measured by a Portable Photophlethysmograph Equivalent to Standard Laboratory Tests?” Journal of Wound Ostomy & Continence Nursing, Vol. 37, No. 5, 2010, pp. 475-486.
 P. Angelov, E. Lughofer and X. Zou, “Evolving Fuzzy Classifiers Using Different Model Architectures,” Fuzzy Sets and Systems, Vol. 159, No. 23, 2008, pp. 3160-3182.
 J. J. Rubio, “SOFMLS: Online Self-Organizing Fuzzy Modified Least Squares Network,” IEEE Transactions on Fuzzy Systems, Vol. 17, No. 6, 2009, pp. 1296-1309.
 C.-H. Lin and G.-W. Lin, “FPGA Implementation of Fractal Patterns Classifier for Multiple Cardiac Arrhythmias Detection,” Journal of Biomedical Science and Engineering, Vol. 5, No. 3, 2012, pp. 120-132.