Screening for X-linked creatine transporter (SLC6A8) deficiency via simultaneous determination of urinary creatine to creatinine ratio by tandem mass-spectrometrySaadet Mercimek‐Mahmutoglu, Sylvia Stöckler‐Ipsiroglu, Gajja S. Salomons et al.|Molecular Genetics and Metabolism|2009Cited by 25