Media type: E-Article Title: Challenges in data collection in the Asian-Pacific region Contributor: Ritchie, Gemma; Keech, Anthony Published: Elsevier BV, 1998 Published in: Controlled Clinical Trials, 19 (1998) 3, Seite S83 Language: English DOI: 10.1016/s0197-2456(98)80198-0 ISSN: 0197-2456 Origination: Footnote: