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Skovsted L, Kristensen M, Hansen M, Siersbaek-Nielsen K.Skovsted L, et al.Acta Med Scand. 1976;199(6):513-5. doi: 10.1111/j.0954-6820.1976.tb06772.x.Acta Med Scand. 1976.PMID: 59517Clinical Trial.