A con­gres­sion­al com­mit­tee has opened an in­quiry in­to Bris­tol My­ers Squibb and Pfiz­er's use of clin­i­cal tri­al sites in Chi­na, in­clud­ing fa­cil­i­ties that the com­mit­tee's chair­man said are af­fil­i­at­ed with the Chi­nese mil­i­tary or that are in a re­gion where the gov­ern­ment has sharply re­pressed a mi­nor­i­ty eth­nic group...