Metta, V., Nichkaode, P. B., Panchbhai, S. V., Charan, S., & Purohit, A. (2020). Clinical study of sterile collagen (Biofil) particles in the management of chronic non healing ulcers and their comparison with saline dressings. International Surgery Journal, 7(4), 1148–1152. https://doi.org/10.18203/2349-2902.isj20201387