Proportion of systematic review protocols registered outside of the International Prospective Register of Systematic Reviews (PROSPERO): A short report

Supplemental file of Annals of Clinical Epidemiology 2022;4(2):49–52<div><p>Supplementary Text 1: Detailed Methodology</p><p>Supplementary Table 1: Characteristics of random samples of protocols registered on the PROSPERO and non-PROSPERO platforms</p></div>