Nov. 27--THEY ALL WORK ON the R-3 East floor, but at different times they used to be on A-4 and C-2 and R-1. Wherever they were in roughly 30 years of nursing at Reading Hospital, they were always together.And that's true even though there are plenty of Reading Hospital wings and corridors to get lost in and scores of ways for people to get separated or even estranged."We're buds, true buddies and we always have been," said 50-year-old Rosemary (Rosie) Carr of Muhlenberg Township, a licensed practical nurse since 1976 who has worked, for most of those years, with colleagues Denise Spinka, 50, Temple; Martie DiSarro, 54, Pennside; Joan Moll, 49, Ephrata Township, Lancaster County; and Sandra Maslo, 59, Muhlenberg Township, all registered nurses."Wherever we've gone in here (at the hospital), we've gone together," Carr said. "We've even had meetings among ourselves to decide upon it."Truth is, we need each other ... I couldn't work without these guys," she said. "It's like we grew up together. Our kids played with one another, we went to weddings together. It's been a lifetime."That they appear to be "The Five Musketeers" -- "One for all, and all for one" -- is remarkable in the ever-changing world of modern nursing, a demanding profession with employee burnout, high turnover and personnel shortages, not to mention the lure of other options for women in a wider variety of careers.Yet, in spite of that, their longevity of togetherness is not exactly a surprise. They are nurses after all.