3Shahn F.How often do children cough?Lancet,1996,348:699
4Chow PY.Chronic cough in children,Thorax,2003,58:998
5Hay AD,Wilson AD.The natural history of acute cough in children aged 0 to 4 years in primary care:a systematic review.Br J Gen Pract,2002,52:401
6Chang AB,Glomb WB.Guidelines for evaluating chronic cough in pediatrics:ACCP evidence-base clinical practice guidelines.Chest,2006,129(1 Suppl):260
7Chang AB,Landau Li.Asperen PPV,et al.Cough in children:defini-tion and clinical evaluation.Med J Aust,2006,184:398
8Fardy HJ.A coughing child:could it be asthma? Aust Fam Physi-cian,2004,33:312
9McGavery LP.Heaney LG,Lawson GT.et al.Evaluation and outcome of patients with chronic non-productive cough using a comprehen-sive diagnostsc protocol.Thorax,1998,53:738