Performance of the Four-Plex Tandem Mass Spectrometry Lysosomal Storage Disease Newborn Screening Test: The Necessity of Adding a 2nd Tier Test for Pompe Disease oleh Shu-Chuan Chiang, Pin-Wen Chen, Wuh-Liang Hwu, An-Ju Lee, Li-Chu Chen, Ni-Chung Lee, Li-Yan Chiou, Yin-Hsiu Chien