Cellraid Ltd, Hallituskatu 13-17 C23, 90100 Oulu, Finland
STUK – Radiation and Nuclear Safety Authority in Finland
In 2009, the Radiation and Nuclear Safety Authority in Finland (STUK), in collaboration with the University of Tampere, launched a cohort study of mobile phone use and health (COSMOS). The study includes an baseline survey and a follow-up questionnaire a couple of years later. All those who participated in the COSMOS study in 2010 or 2011 are now asked to fill out the follow-up questionnaire. Invitations will be sent out by email or as text messages at the end of October.