INNSBRUCK, Austria  - Dutch Prince Johan Friso, the second son of Queen Beatrix, suffered massive brain damage in an avalanche in Austria and might never regain consciousness, his doctors said Friday. “It can’t be said with certainty at this point whether Prince Friso will ever regain consciousness again,” Wolfgang Koller, head of the trauma unit at Innsbruck University Hospital, told a press conference. “In any case, a neurological rehabilitation will be required that will take months, if not years.” The 43-year-old father of two young daughters was caught in an avalanche while skiing off-piste with a friend in the posh Austrian ski resort of Lech a week ago.