<qa>  What is the loading dose of morphine 0.2 mgKg?A loading dose of morphine 0.2 mgKg will be given before the end of surgery provided that the patient can maintain spontaneous breathing or pressure support ventilation. Intravenous morphine patient-controlled analgesia PCA will be initiated on the arrival to the recovery room with boluses of 1 mg and a lockout time of 6 minutes, without background. 