Liu, Jung-Tzu, Chyng-Shyan Tzeng, and Hsiao-Hui Tsou. 2014. “Establishing Non-Inferiority of a New Treatment in a Three-Arm Trial: Apply a Step-Down Hierarchical Model in a Papulopustular Acne Study and an Oral Prophylactic Antibiotics Study”. International Journal of Statistics in Medical Research 3 (1):11-20. https://doi.org/10.6000/1929-6029.2014.03.01.3.