Jamal Musiala had to be helped off the pitch eight minutes after coming on as a substitute [Getty Images]Bayern Munich say Jamal Musiala will "speak out" after the Germany midfielder collapsed during a match for the second time in a four-day period.On Tuesday, Musiala collapsed six minutes after coming off the bench in Bayern's 4-2 friendly victory at Heidenheim.The 23-year-old appeared dazed as he received medical treatment and was helped off the pitch.The incident occurred after he collapsed d