Longtime Yes bassist and vocalist Chris Squire has been diagnosed with Acute Erythroid Leukemia (AEL), an uncommon form of Acute Myeloid Leukemia (AML), in which he will be sitting out the upcoming North American summer tour with Toto and the Cruise To The Edge to receive treatment in his hometown of Phoenix, AZ over the next few months. Billy Sherwood will be filling in on those dates.