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Examples of body composition in two patients, both body mass index (BMI) of 24 kg/m2. Red indicates the total cross‐sectional skeletal muscle area in the L3 region. (a) A 68‐year‐old male patient with low skeletal muscle index (SMI = 31.5 cm2/m2). (b) A 65‐year‐old male patient with normal SMI (SMI = 55.8 cm2/m2). L3, third lumbar vertebra
