REFILE-UPDATE 2-Advent makes bid in three-way tussle for Stada
February 23, 2017 at 14:15 PM EST
FRANKFURT, Feb 23 (Reuters) - Buyout firm Advent International raised the stakes in a battle for German generic drugs maker Stada Arzneimittel on Thursday with a 3.6 billion euro ($3.8 billion) takeover offer, giving management until Monday to respond.