HMGCR and chronic obstructive pulmonary disease: The following MESH terms were used, tailored to each of the three research aims: COPD, chronic obstructive pulmonary disease, dyslipidaemia, sarcopenia, muscle wasting, Hydroxymethylglutaryl-CoA Reductase Inhibitors, statin, Nutraceuticals, Nutraceutical, Dietary Supplement, Functional Food, Natural Compound, Polyphenol, and Omega-3 Fatty Acid.