Cite

    Sam Lim et al.. “Comparison of high dose inhaled steroids, low dose inhaled steroids plus low dose theophylline, and low dose inhaled steroids alone in chronic asthma in general practice.” Thorax, vol. 55, no. 10, 2000, pp. 837–841. http://access.bl.uk/ark:/81055/vdc_100135154476.0x00002e