tee meng kang, khairul najmi muhammad nawawi, ngiu chai soon, deborah chew chia hsin, raja affendi raja ali, wong zhiqin.  (2022).  high dose oestrogen in life threatening obscure gastrointestinal bleeding.  - acta medica indonesiana.  456-458. 

kok-yong chin, kok-lun pang, sok kuan wong, deborah chia hsin chew & haji mohd saad qodriyah.  (2022).  relationship amongst vitamin k status, vitamin k antagonist use and osteoarthritis: a review.  - drugs & aging.  487-504. 

khairul najmi muhammad nawawi, norfilza m. mokhtar, zhiqin wong, zairul azwan mohd azman, deborah chia hsin chew, rasyidah rehir, leong gee huey, fuad ismail, isa mohamed rose, yazmin yaacob, hamzaini abdul hamid, ismail sagap, raja affendi raja ali.  (2021).  incidence and clinicopathological features of colorectal cancer among multi-ethnic patients in kuala lumpur, malaysia: a hospital-based retrospective analysis over two decades.  - peerj.  1-17. 

nurwahyuna rosli, nur alyssa rozaimi, muhammad harith abdul shukor, jevetha m. rajendran, loo shi ting, deborah chew chia hsin, fazarina mohammed.  (2021).  the incidence and histological diagnosis of barrett oesophagus at hospital canselor tuanku muhriz.  - the malaysian journal of pathology.  142. 

sumitro kosasih, khairul najmi muhammad nawawi, zhiqin wong, deborah chew chia hsin, andrea yu-lin ban, raja affendi raja ali.  (2019).  upper gastrointestinal bleed due to duodenal metastases of lung adenocarcinoma: report of two cases and review of literature.  - case reports in medicine.  1-4. 

deborah chia hsin chew, jeevinesh naidu, agni nhirmal kumar sugurmar, khairul najmi muhammad nawawi, raja affendi raja ali.  (2019).  brunners gland hyperplasia manifesting as a bleeding duodenal polyp.  - journal of gastroenterology and hepatology.  385. 

mohd khairul mohd kamil, ngiu chai soon, nurismah md isa, yazmin yaacob, deborah chew chia hsin, wong zhiqin, raja affendi raja ali.  (2018).  unexplained ascites, a sign for neuroendocrine carcinoma.  - medical journal of malaysia.  60-62. 

deborah chew, wong zhiqin, norhayati ibrahim,raja affendi raja ali.  (2018).  optimizing the multidimensional aspects of the patient-physician relationship in the management of inflammatory bowel disease.  - intestinal research.  509-521.