1. Department of Medicine, King Edward Medical University, Lahore 54000, Pakistan
2. Department of Medicine, Allama Iqbal Medical College, Lahore 54550, Pakistan
3. Department of Paediatrics, King Edward Medical University, Lahore 54000, Pakistan
4. Respiralab Research Center, Guayaquil 090512, Ecuador
5. School of Medicine, Universidad Espíritu Santo, Guayaquil 092301, Ecuador