The National Institute of Child Health and Human Development Early Child Care Research Network, McLeod LD. Psychosocial and lifestyle factors associated with early-onset persistent and late-onset asthma. J Child Health Care. 2010;39(3):185-98.
Pring CM, Skelding-Millar L, Goodall RJ. Expectant treatment or cholecystectomy after endoscopic retrograde cholangiopancreatography for choledocholithiasis in patients over 80 years old? Surg Endosc. 2005 Mar;19(3):357-60.
Mansfield CA, Van Houtven G, Huber J. The efficiency of political mechanisms for siting nuisance facilities: are opponents more likely to participate than supporters? J Real Estate Financ Econ. 2001;22(2/3):141-62.