Niriella, M.A.; Dassanayake, A.S.; Kalubowila, K.; Kalubowila, U.; de Silva, A.P.; Wickremasinghe, A.R.; Kato, N.; Makaya, M.; de Silva, H.J.(American Gastroenterological Association(AGA) Institute, Published by Elsevier Inc., 2009)
de Silva, A.P.; Amarasiri, L.; Kottahachchi, D.C.; Sabhapathige, R.D.; Dassanayake, A.S.; de Silva, H.J.(American Gastroenterological Association(AGA) Institute, Published by Elsevier Inc., 2006)