Effect of Vitamin B12Injection on the Vocal Performance of Professional Singers: A Randomized, Double-blind, Placebo-Controlled, Crossover Trial

Hagit Shoffel-Havakuk, Christian X. Lava, Yonatan Reuven, Dominic Moog, Karla Odell, Lindsay S. Reder, Edie R. Hapner, Michael M. Johns*

*Corresponding author for this work

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Medicine & Life Sciences