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Higham, C E; Thomas, J D J; Bidlingmaier, M; Drake, W M; Trainer, P J . (2009). Successful use of weekly pegvisomant administration in patients with acromegaly. European Journal of Endocrinology, 161(1), 21–25. doi:10.1530/EJE-08-0990 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research