Can We Identify Subgroups in Which ICSI is Cost-Effective Over IVF: A Secondary Analysis of a Randomised Clinical Trial oleh Ben W. MOL, Lan N. VUONG, Tam M. LUU, Toan D. PHAM, Tuong M. HO, Anh N. HA, Binh T. TRUONG, Anh K. PHAN, Dung P. NGUYEN, Thanh N. PHAM, Quan T. PHAM, Rui WANG, Robert J. NORMAN, Vinh Q. DANG