Abu Dhabi Investment Authority (ADIA) plans to join one of the biggest leveraged buyouts of all time by investing about $1 billion alongside a consortium acquiring medical supply company Medline Industries Inc ., Bloomberg reported citing people familiar with the matter. ADIA is backing the takeover of Medline by Blackstone Group Inc., Carlyle Group Inc. and Hellman & Friedman, the people said, asking to remain unidentified due to information confidentiality ...