4. Pharmacoeconomics. 2009;27(6):507-17. doi: 10.2165/00019053-200927060-00006.
Determinants of direct cost differences among US employees with major depressive disorders using antidepressants.
Birnbaum HG, Ben-Hamadi R, Greenberg PE, Hsieh M, Tang J, Reygrobellet C.