Oil rises above $50 despite doubts over OPEC output cut

By Sabina Zawadzki LONDON (Reuters) - Oil rebounded from the week's lows to stabilise above $50 a barrel on Thursday as market watchers focused on a weekend meeting of OPEC and non-OPEC producers that may result in an agreement to cut crude output further. Brent and U.S. oil prices gained support earlier from a slightly weaker dollar, but the U.S. currency turned positive as the euro fell on the European Central Bank's decision to extend but reduce its bond-buying programme. Oil producers meet i