labcorp应该是垄断了，或者是one of two。以前上MBA的事专门研究过他们的case

来源: BJming 于 2020-03-05 15:07:26 [旧帖] [给我悄悄话] 本文已被阅读：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.