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Alfonso Bellia, Caterina Garcovich, Monica D’Adamo, Mauro Lombardo, Manfredi Tesauro, Giulia Donadel, Paolo Gentileschi, Davide Lauro, Massimo Federici, Renato Lauro, Paolo Sbraccia. (2013). Serum 25-hydroxyvitamin D levels are inversely associated with systemic inflammation in severe obese subjects. , 8(1), 33–40. doi:10.1007/s11739-011-0559-x 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research