Wijewantha, H.; de Silva, A.P.; Wijesinghe, N.T.; Kumarasena, R.S.; Dassanayake, A.S.; Hewavisenthi, S.J.; de Silva, H.J.(American Gastroenterological Association(AGA) Institute, Published by Elsevier Inc., 2011)
Ranawaka, C.; Niriella, M.A.; Kumarasena, R.S.; Miththinda, J.K.N.D.; de Silva, A.P.; Premaratna, R.; de Silva, H.J.(American Gastroenterological Association(AGA) Institute, Published by Elsevier Inc., 2013)