SINGAPORE (Reuters) - Oil prices slipped lower on Monday as traders assessed China's oil demand following the coronavirus outbreak and waited to see if major producers will cut output further to balance markets.Oil is off more than 20% from peaks struck in January after a spreading virus hit demand in the world's largest oil importer and fuelled concerns of excess supplies. Brent crude slipped to $53.63 a barrel in early Asian trade, the lowest since Jan. 2, 2019, before recovering to $54.32 by..