Whitehead , Shahidullah J, Kettlewell P, Quinlan N, Strony R
Tanaka Y, Kanazawa M, Palsson OS, Van Tilburg MA, Gangarosa , Fukudo S, Drossman D, Whitehead
Wood JD, Liu S, Drossman D, Ringel Y, Whitehead
Rahman MM, Ghoshal UC, Rowshon AH, Ahmed F, Kibria MG, Hasan M, Gwee KA, Whitehead
Kanazawa M, Nakajima S, Oshima T, Whitehead , Sperber AD, Palsson OS, Drossman D, Miwa H, Fukudo S
Ghoshal UC, Gwee KA, Chen M, Gong XR, Pratap N, Hou X, Syam AF, Abdullah M, Bak YT, Choi MG, Gonlachanvit S, Chua AS, Chong KM, Siah KT, Lu CL, Xiong L, Whitehead