disorder. Only highly qualified centers where more specific tests are available may take on the task of further evaluation. The platelet physiology subcommittee of the International Society of Thrombosis and Haemostasis (ISTH) has dedicated its work during recent years to searching for ways to improve and standardize platelet function testing, applying platelet aggregometry, the PFA-100 device,...

Motivated by a conjecture of Frid, Puzynina, and Zamboni, we investigate infinite words with the property that for infinitely many n, every length-n factor is a product of two palindromes. We show that every Sturmian word has this property, but this does not characterize the class of Sturmian words. We also show that the Thue–Morse word does not have this property. We investigate finite words w...