[1] JERRY L PETTIS VET ADM HOSP, MINERAL METAB SECT, LOMA LINDA, CA USA
[2] UNIV CALIF SAN FRANCISCO, DEPT MED, SAN FRANCISCO, CA 94143 USA
[3] UNIV CALIF SAN FRANCISCO, DEPT ORTHOPED SURG, SAN FRANCISCO, CA 94143 USA
[4] LOMA LINDA UNIV, DEPT MED, LOMA LINDA, CA 92350 USA
[5] CREIGHTON UNIV, DEPT MED, ENDOCRINOL & METAB SECT, OMAHA, NE 68178 USA