During his study, he first worked at the laboratory of C. Fred Fox at the UCLA, and then at Robert Lefkowitz's group at Duke University, earning him two articles published in 1984 and 1982 respectively.
Selama studi pertamanya, ia pertama kali bekerja di laboratorium C. Fred Fox di UCLA, dan kemudian dalam kelompok Robert Lefkowitz's di Universitas Duke, memberinya dua artikel yang dipublikasikan berturut-turut pada 1982 dan 1984.