“…Some studies were performed in two or more countries: Belgium, Netherlands, UK, Germany, Hungary [ 67 ]: North America, Australia [ 68 ], UK, Ireland, USA [ 69 ], USA, UK, Australia, Canada, Belgium, Germany, Hong Kong, Japan, Malaysia, Singapore [ 70 ], USA, UK, Sweden, Netherlands, Spain, Canada, Ireland, Australia, New Zealand [ 71 ], South Africa, Kenya, South Korea, United States, Canada, UK, Belgium, Finland, Poland [ 72 ], Australia, New Zealand, UK [ 73 ], Canada, USA, UK [ 74 ]. The rest were in Belgium [ 75 , 76 ], Sweden [ 77 , 78 , 79 ], Brazil [ 80 ], China [ 81 ], Switzerland [ 82 ], the Netherlands [ 83 , 84 ], Norway [ 85 ], New Zealand [ 86 ], Denmark [ 87 ] and Hong Kong [ 88 ]. There were six studies with no information on the country/city where the research was performed [ 89 , 90 , 91 , 92 , 93 , 94 , 95 , 96 ].…”