1.
Wing-yan Au, Suk-Kwan Tsang, Ben K.L. Cheung, Tak-Shing Siu, Edmond S.K. Ma, Sidney Tam. Cough mixture abuse as a novel cause of folate deficiency: a prospective, community-based, controlled study. Haematologica 2007;92(4):562-563; https://doi.org/10.3324/haematol.10859.