Sweden is a part of the Schengen agreement and residents of the Schengen states can travel to Sweden without a visa. Citizens of some countries, e.g. the US or Chilean citizens, benefit from the waiver-program and do not need visas. Please check if you need a visa to attend ISSTT2019 at the webpage of the Swedish Migration Agency.
Once you decide to attend the ISSTT2019 and register for the Symposium, we will provide you with an invitation letter (the link to be available at the registration page).
Göteborg's Official Visitor Guide provides description of various options for travelling to Göteborg.
From Gothenburg Landvetter Airport you could travel: