Tongsuntud, Sureeporn, Vilai Kuptniratsaikul, and Chompusakdi Pulket. 2014. “A Maximum Compression Force Assessment of Two Types of the Stretchers During Moving Patients”. Siriraj Medical Journal 66 (3). https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/55275.