[1] CHILDRENS ORTHOPED HOSP & MED CTR, DIV VIROL G5371, SEATTLE, WA 98105 USA
[2] UNIV WASHINGTON, DEPT LAB MED, SEATTLE, WA 98195 USA
[3] UNIV ALBERTA, DEPT MED, EDMONTON T6G 2E1, ALBERTA, CANADA
[4] UNIV WASHINGTON, DEPT MED, SEATTLE, WA 98195 USA
[5] SIR MORTIMER B DAVIS JEWISH GEN HOSP, DEPT MED, MONTREAL H3T 1E2, QUEBEC, CANADA
[6] UNIV VERMONT, COLL MED, DEPT MED, BURLINGTON, VT 05405 USA
[7] UNIV CALIF SAN DIEGO, DEPT MED, LA JOLLA, CA 92093 USA
[8] BURROUGHS WELLCOME CO, RES TRIANGLE PK, NC 27709 USA
[9] UNIV CALIF SAN DIEGO, DEPT PEDIAT, LA JOLLA, CA 92093 USA
[10] UNIV CALIF SAN DIEGO, DEPT PATHOL, LA JOLLA, CA 92093 USA
[11] SAN DIEGO VET ADM MED CTR, LA JOLLA, CA USA