Table 1.

Search terms and search strategy.

Patient/Population	Intervention	Outcome	Study Designs	Combining Search Terms
Patients	Amino acid		Randomized controlled trial
Patients undergoing Surgery OR patients with Pressure Ulcers OR Patients with Critical Illness	Amino Acid OR Arginine OR Glutamine OR Nutrition	Inflammation OR Healing OR Wound OR Cytokines OR Interleukin OR Hospital Stay OR C-reactive protein	Clinical trial OR Randomised controlled trial OR controlled clinical trial	Column 1 AND Column 2 AND Column 3 AND Column 4