M. Keller

Risedronate therapy prevents corticosteroid-induced bone loss: a twelve-month, multicenter, randomized, double-blind, placebo-controlled, parallel-group study.

S. Wallach, S. Cohen, A. Chines, 1999, Arthritis and rheumatism.

The epidemiology of generalized anxiety disorder.

R. Kessler, M. Keller, H. Wittchen, 2001, The Psychiatric clinics of North America.

Epidemiology of Asthma

S. Lowenstein, M. B. Keller, M. Keller, 2002, Seminars in respiratory and critical care medicine.