[1] Univ Geneva, Hop Cantonal, CH-1211 Geneva, Switzerland
[2] Hop Cochin, F-75674 Paris, France
[3] Univ Pittsburgh, Pittsburgh, PA 15260 USA
[4] Michigan Bone Clin, Detroit, MI USA
[5] Northwestern Univ, Chicago, IL 60611 USA
[6] Emory Univ, Atlanta, GA 30322 USA
[7] Univ Verona, I-37100 Verona, Italy
[8] Merck Res Labs, Rahway, NJ USA