BOCA RATON, Fla. -- A 62-year-old Boca Raton woman died Friday after lighting a cigarette while using an oxygen tank, officials said. Rosalyn Sedlak's death is being termed accidental by Palm Beach County sheriff's officials. She was smoking in a bedroom of her 87-year-old mother's home when the fire started and managed to get into a nearby bathroom, but collapsed there and was dead when firefighters arrived. "You just don't smoke in an oxygen-enriched atmosphere," fire-rescue Capt. Don DeLucia told The Palm Beach Post for its Saturday editions. "The public has to realize that if they absolutely have to smoke,...