Mohammed H. Elgendy and Wael O. A. Abd El-khalek (2019) “VALIDITY AND INTRA-RATER RELIABILITY OF LASER GONIOMETER VERSUS ELECTRO-GONIOMETER IN MEASURING SHOULDER RANGE OF MOTION”, International Journal of Physiotherapy, 6(5), pp. 169–176. doi: 10.15621/ijphy/2019/v6i5/186838.