Clinical and economic implications of upper gastrointestinal adverse events in Asian rheumatological patients on long-term non-steroidal anti-inflammatory drugs por Pok, Say Lee, Shabaruddin, Fatiha Hana, Dahlui, Maznah, Sockalingam, Sargunan, Mohamed Said, Mohd Shahrir, Rosman, Azmillah, Lau, Ing Soo, Isa, Liza Mohd, Hussein, Heselynn, Ng, Chin Teck, Mahadeva, Sanjiv