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Katayama M, Kaneko S, Tsukimura T, Takamatsu K, Togawa T. Multivariate analysis of D- and L-amino acid composition in human seminal plasma reveals correlations with sperm concentration, motility and morphology. Paripex Ind. J. Res. 2016. 5. 458-461
Katayama M, Kaneko S, Takamatsu K, Tsukimura T, Togawa T. Thirty-seven amino acids and three related nitrogen compounds in human seminal plasma: multivariate analyses reveal strong correlations among asparagine, glutamine, and ammonia with sperm parameters. Ind. J. Appl. Res. 2015. 5. 199-203