Authors: Shantha M W Rajaratnam; Laura K Barger; Steven W Lockley; Steven A Shea; Wei Wang; Christopher P Landrigan; Conor S O'Brien; Salim Qadri; Jason P Sullivan; Brian E Cade; Lawrence J Epstein; David P White; Charles A Czeisler Journal: JAMA Date: 2011-12-21 Impact factor: 56.272
Authors: Karen J Sherman; Daniel C Cherkin; Robert D Wellman; Andrea J Cook; Rene J Hawkes; Kristin Delaney; Richard A Deyo Journal: Arch Intern Med Date: 2011-10-24