Authors: Danil Gamboa; Benedicte Jørgenrud; Evgeny A Bryun; Vigdis Vindenes; Evgenya A Koshkina; Aleksei V Nadezhdin; Saranda Kabashi; Elena J Tetenova; Thomas Berg; Anna Armika Tussilago Nyman; Alexey J Kolgashkin; Aleksei E Petukhov; Sergey N Perekhodov; Elena N Davydova; Anners Lerdal; Gudmund Nordby; Stig Tore Bogstrand Journal: BMJ Open Date: 2020-09-17 Impact factor: 2.692