sentences:  He has served as an editor or a member of the editorial boards of several journals.According to Google Scholar, his work has been cited over 22,000 times in scientific literature, and he has an h-index of 73.His 2019 book "Kampen om oksygenet" ("The War Over Oxygen") discusses what he describes as "one the greatest scandals in the history of medicine;" former Prime Minister Kjell Magne Bondevik introduced the book when it was released at the House of Literature in Oslo.