1. Udupihille M. Peak expiratory flow rate in Sri Lankan schoolchildren of Sinhalese ethnic origin. Respir Med 1994;88:219–227.
2. Graff-Lonnevig V, Harfi H, Tipirneni P. Peak expiratory flow rates in healthy Saudi Arabian children living in Riyadh. Ann Allergy 1993;71:446–450.
3. Ismail Y, Azmi NN, Zurkurnain Y. Lung function in Malay children. Med J Malaysia 1993;48:171–174.
4. Malik SK, Jindal SK, Banga N, Sharda PK, Gupta HD. Peak expiratory flow rate of healthy north Indian teachers. Indian J Med Res 1980;71:322–324.
5. Kamat SR, Tyagi NK, Rashid SSA. Lung function in Indian adult subjects. Lung India 1982;1:11–21.