[1] Univ Nevada, Savitt Med Lib 306, Reno, NV 89557 USA
[2] Ctr Dis Control & Prevent, CDC Informat Ctr, Atlanta, GA 30333 USA
[3] Natl Lib Med, Natl Informat Ctr Hlth Serv Res & Hlth Care Techn, Bethesda, MD 20894 USA
[4] Cornell Univ, Weill Med Coll, Samuel J Wood Lib, New York, NY 10021 USA
[5] Univ Washington, Natl Network Lib Med, NNLM Outreach, Evaluat Resource Ctr, Seattle, WA 98195 USA