Comparison of the effect of a 5-week series of positional release therapy and muscle energy technique on pain threshold and mobility of the cervical spine in people with the upper crossed syndrome - Janczarzyk, Dawid; Jamka, Krzysztof; Mikołajczyk, Edyta; Zarzeka, Aleksandra; Krężałek, Piotr (Physiotherapy Review, 2024)