AGREEMENT AND PLAN OF MERGER by and among ACCUHEALTH, INC., HHI ACQUIRING CORP., HEALIX HEALTHCARE, INC., LINDA BARKAN, CHAIM CHARYTAN, M.D., MARY COMERFORD, JEFFREY S. FREED, M.D., DONALD GIAQUINTO, ROBERT GIAQUINTO, ROBERT LABRA, KATHLEEN P. O'BRIEN...