Technical appendix
Phillips
KA
School of Pharmacy and Institute for Health Policy Studies, University of California, San Francisco, 3333 California St, Room 420, Box 0613, San Francisco, CA 94143. kathryn@itsa.ucsf.edu.
Shlipak
MG
Coxson
P
Heidenreich
PA
Hunink
MG
Goldman
PA
Williams
LW
Weinstein
MC
Goldman
L