Health Highlights: Sept. 27, 2004 Here are some of the latest health and medical news developments, compiled by editors of HealthDay:    ------    Average Cost of U.S. Nursing Home is \$70K Annually: Survey      The average cost of a private room in a nursing home in the United States is \$70,080 a year, or \$192 a day, according to a survey released Monday by the MetLife Mature Market Institute...