Nilsson , S., Eriksson , U., Johansson , J., Kaijser , L., Lassvik , C., Mölgaard , J., Olsson , A. G. and Walldius , G. (1998) “The Ability of Non-invasive Physiological Tests to Detect Arterial Occlusions in the Lower Extremity: An ROC study with particular regard to recruitment of patients for clinical trials”, Upsala Journal of Medical Sciences, 103(1), pp. 61-76. doi: 10.3109/03009739809178945.