Medical services group HC Surgical Specialists (HCSS) is to acquire an additional 19% stake in Julian Ong Endoscopy & Surgery (JOES) for S$3.8m (US$2.7m) to take its holding in the company up to 70%. It first took a 51% stake in JOES, which operate a new endoscopy clinic at Mount Elizabeth Novena Hospital, for S$2.2…