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Peter T. Pacik; Craig E. Nelson; Catherine Werner. (2008). Pain Control in Augmentation Mammaplasty Using Indwelling Catheters in 687 Consecutive Patients: Data Analysis. , 28(6), 631–641. doi:10.1016/j.asj.2008.09.001 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research