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Schlingmann, Karl P.; Weber, Stefanie; Peters, Melanie; Niemann Nejsum, Lene; Vitzthum, Helga; Klingel, Karin; Kratz, Markus; Haddad, Elie; Ristoff, Ellinor; Dinour, Dganit. (2002). Hypomagnesemia with secondary hypocalcemia is caused by mutations in TRPM6, a new member of the TRPM gene family. , 31(2), 166–170. doi:10.1038/ng889 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research