Authors: Shawn D Youngstedt; Girardin Jean-Louis; Richard R Bootzin; Daniel F Kripke; Jonnifer Cooper; Lauren R Dean; Fabio Catao; Shelli James; Caitlin Vining; Natasha J Williams; Michael R Irwin Journal: Contemp Clin Trials Date: 2013-06-28 Impact factor: 2.226