Gravar-mail: Answer to Cabona et al « Isolated musculocutaneous nerve involvement in COVID-19 related Neuralgic amyotrophy» Joint Bone Spine 2021;88:105238 and to Finsterer and Scorza « SARS-CoV-2 or SARS-CoV-2 vaccination associated Parsonage-Turner syndrome». Joint Bone Spine 2021;88:105239