A paper which was partly funded by Polar Finnland: https://pubmed.ncbi.nlm.nih.gov/31004219 Is used by Rob ter Horst PhD. as a scientific justification to choose the Polar H10 has his reference device: https://pubmed.ncbi.nlm.nih.gov/31004219 But as Peter Gamma from www.petergamma.org has written here, this is controversial: SCHILLER AG is a global medical technology group with headquarters in Baar …