Suwanasri C, Skulchan N, Leelakajohnkit S, Sakunkaruna Y, Thermworakul L, Sukjai S. Changing of output of ultrasound among before, after 1 and 2 months of use in a physical therapy clinic. Arch AHS [Internet]. 2012 Apr. 25 [cited 2024 May 12];24(1):110-6. Available from: https://he01.tci-thaijo.org/index.php/ams/article/view/66269