@book{20362,
	title = {Pakistan postgraduate medical journal},
	publisher = {Postgraduate Medical Institute},
	year = {2012},
	address = {Lahore},
	note = {Vol. 22, no. 4 (Oct-Dec, 2011)-: Vol. 23, no. 2 (April-June, 2012)-: Vol. 23, no. 4 (Oct-Dec, 2012)-: Vol. 24, no. 2 (April-June, 2012)-}
}