Effects of diaphragmatic breathing and manual diaphragm relaxation on respiratory muscle strength, chest expansion, pulmonary function, and sitting ability in children with diplegic cerebral palsy: A randomized controlled trial. - Karamancıoğlu B; Coşkun ÖK; Erdem-Eralp E; Gökdemir Y; Karadag-Saygı E (Journal of pediatric rehabilitation medicine, 2026)