21-year Cleveland Clinic nutritional study –
Esselstyn CB., Jr. Prevent and Reverse Heart Disease. New York: Avery; 2007 – Results were published at 5, 12, and 16 years, and updated beyond 20 years –
Esselstyn CB, Jr, Ellis SG, Medendorp SV, et al. A strategy to arrest and reverse coronary artery disease: a 5 year longitudinal study of a single physician’s practice. J Fam Pract. 1995;41:560–568.