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Perkisas, S., Bastijns, S., Sanchez-Rodriguez, D. et al. Application of ultrasound for muscle assessment in sarcopenia: 2020 SARCUS update: reply to the letter to the editor. Eur Geriatr Med 12, 427–428 (2021). https://doi.org/10.1007/s41999-021-00462-y
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DOI: https://doi.org/10.1007/s41999-021-00462-y