Multicenter Study

Coffee consumption and risk of total and cardiovascular mortality among patients with type 2 diabetes.

Diabetologia. 2006 Nov 1;49(11):2618-26.
Randomized Controlled Trial

Frequency of nut consumption and mortality risk in the PREDIMED nutrition intervention trial.

Bmc Med. 2013 Jan 1;11:164.
Article

Daytime napping and mortality, with a special reference to cardiovascular disease: the JACC study.

Int J Epidemiol. 2010 Feb 1;39(1):233-43.