Table 1 The retrieval strategy

#1

((((((((((((((((energy[Title/Abstract]) OR (nutrition[Title/Abstract])) OR (nutritional supplementation [Title/Abstract])) OR (dietary supplements [Title/Abstract])) OR (macronutrient[Title/Abstract])) OR (micronutrient[Title/Abstract])) OR (carbohydrate[Title/Abstract])) OR (protein[Title/Abstract])) OR (amino acid[Title/Abstract])) OR (fat[Title/Abstract])) OR (fatty acid[Title/Abstract])) OR (omega-3[Title/Abstract])) OR

(mineral[Title/Abstract])) OR (vitamin[Title/Abstract])) OR (arginine[Title/Abstract])) OR (glutamine[Title/Abstract])) OR (zinc[Title/Abstract])) OR (iron[Title/Abstract])) OR (calcium[Title/Abstract])

#2

(chronic obstructive pulmonary disease [Title/Abstract]) OR (COPD[Title/Abstract])

#3

((sarcopenia [Title/Abstract]) OR (muscle wasting [Title/Abstract])) OR (muscle atrophy [Title/Abstract])

#4

((((((((((((((((((energy[Title/Abstract]) OR (nutrition[Title/Abstract])) OR (nutritional supplementation [Title/Abstract])) OR (dietary supplements [Title/Abstract])) OR (macronutrient[Title/Abstract])) OR (micronutrient[Title/Abstract])) OR (carbohydrate[Title/Abstract])) OR (protein[Title/Abstract])) OR (amino acid[Title/Abstract])) OR (fat[Title/Abstract])) OR (fatty acid[Title/Abstract])) OR (omega-3[Title/Abstract])) OR

(mineral[Title/Abstract])) OR (vitamin[Title/Abstract])) OR (arginine[Title/Abstract])) OR (glutamine[Title/Abstract])) OR (zinc[Title/Abstract])) OR (iron[Title/Abstract])) OR (calcium[Title/Abstract])) AND ((chronic obstructive pulmonary disease[Title/Abstract]) OR (COPD[Title/Abstract]))) AND (((sarcopenia[Title/Abstract]) OR (muscle wasting[Title/Abstract])) OR (muscle atrophy[Title/Abstract]))