Rohil, V., Vijayan, V., Kumar, R., Joshi, R., Pavani, P., Paul, S., Sharma, A., & Rahman, M. (2017). A study on the correlation of matrix metalloproteinase MMP1 in COPD and smoking in the North Indian population. Asian Journal of Medical Sciences, 8(1), 5-14. https://doi.org/10.3126/ajms.v8i1.16020