1. Md. Nadiruzzaman is Assistant Professor at Maastricht University Department of Health, Ethics and Society, P. Debyeplein 1, Maastricht 6229 HA, Netherlands and Research Associate at Universität Hamburg Ringgold standard institution – Geography, Grindelberg 7, Hamburg, Hamburg 20144, Germany; Jürgen Scheffran is Professor for Integrative Geography, Universität Hamburg, Grindelberg 7, Hamburg, Hamburg 20144, Germany;