TY - SER AU - Wong,Siu Kay AU - Yao,Wai Yin TI - Bias analysis of proficiency testing programme results KW - PROFICIENCY TESTING KW - IF N1 - YI2017 M02 Sources - Accreditation and Quality Assurance Sources - 21 (3) 2016 : 185-189 ISSN - 0949-1775 ER -