Measurement of fetal fraction in cell-free DNA from maternal plasma using a panel of insertion/deletion polymorphisms. oleh Angela N Barrett, Li Xiong, Tuan Z Tan, Henna V Advani, Rui Hua, Cecille Laureano-Asibal, Richie Soong, Arijit Biswas, Niranjan Nagarajan, Mahesh Choolani