Ding Chuan Tang, a Chinese herb decoction, could improve airway hyper-responsiveness in stabilized asthmatic children: a randomized, double-blind clinical trial. - Chan,C.K.; Kuo,M.L.; Shen,J.J.; See,L.C.; Chang,H.H.; Huang,J.L. (Pediatr Allergy Immunol, 2006)