Effectiveness of Motivational Interviews for Alleviating Pre- and Postoperative Anxiety and Postoperative Pain Among Patients Undergoing Surgery: A Systematic Review and Meta-Analysis. - Villalba-Aguilar C; Laredo-Aguilera JA; Villalba-Aguilar L; de Paz-Montón LP; Serrano-Fernández V; Carmona-Torres JM (Medicina (Kaunas, Lithuania), 2026)