T. D. Leong and D. Besada, “Direct healthcare cost comparison of fluticasone/salmeterol and budesonide/formoterol maintenance and reliever therapy for moderate to severe asthma in the South African public sector”, Afr J Thoracic Crit Care Med, vol. 32, no. 1, p. e3898, Mar. 2026, doi: 10.7196/AJTCCM.2026.v32i1.3898.