Barakat, Nermeen Mahmoud Abd Elaziz. “Effect of Risk Factors of Bronchial Asthma on Elderly Health Related Quality of Life at Assiut University Hospital, Egypt”. International Journal of Advanced Nursing Studies, vol. 6, no. 1, Dec. 2016, pp. 1-6, https://doi.org/10.14419/ijans.v6i1.6910.