6Zhang Q, Liao Y, Tang C, et al. Twenty-four-hour urinary sodium excretion and postural orthostatic tachyeardia syndrome[J]. J Pedi- atr,2012,161:281-284.
7Zhao J, Du S, Yang J, et al. Usefulness of plasma copeptin as a bio- marker to predict the therapeutic effectiveness of metoprolol for postural tachycardia syndrome in children[J]. Am J Cardiol, 2014, 114:601-605.
8Zhang Q, Chen X, Li J, et al. Orthostatic plasma norepinephrine lev- el as a predictor for therapeutic response to metoprolol in children with postural tachycardia syndrome[J]. J Transl Med, 2014, 12:249.
9Jing Lin, Han Z, Li H, et al. Plasma C-type natriuretic peptide as a predictor for therapeutic response to metoprolol in children with postural tachycardia syndrome[J]. PLoS One, 2015, 10:e0121913.
10Yang J, Zhao J, Du S, et al. Postural orthostatic tachycardia syn- drome with increased erythrocytic hydrogen sulfide and response to midodrine hydrochloride[J]. J Pediatr, 2013, 163:1169-1173.
