Department of Rheumatology, All India Institute of Medical Sciences, New Delhi, India. Electronic address: rpgaiims512@gmail.com. Department of Medicine and Microbiology, All India Institute of Medical Sciences, New Delhi, India. Department of Mathematics and Statistics, Aliah University, Kolkata, India. Department of Rheumatology, All India Institute of Medical Sciences, New Delhi, India. Department of Neurology, Amsterdam UMC, University of Amsterdam, Amsterdam Neuroscience, PO Box 22660, 1100DD Amsterdam, the Netherlands. Electronic address: a.j.kooi@amsterdamumc.nl. Department of Neurology, Amsterdam UMC, University of Amsterdam, Amsterdam Neuroscience, PO Box 22660, 1100DD Amsterdam, the Netherlands. Electronic address: j.lim@amsterdamumc.nl. Department of Neurology, Amsterdam UMC, University of Amsterdam, Amsterdam Neuroscience, PO Box 22660, 1100DD Amsterdam, the Netherlands. Electronic address: j.raaphorst@amsterdamumc.nl. Emergency Medicine, AziendaOspedaliera Marche Nord, Fano, PU 61032, Italy. Clinica Medica, Department of Clinical and Molecular Sciences, Polytechnic University of Marche, Torrette di Ancona 60020, Italy. Electronic address: m.g.danieli@univpm.it.