共 50 条
- [21] WHY IS IMPLEMENTATION SO DIFFICULT MANAGEMENT SERVICES IN GOVERNMENT, 1978, 33 (04): : 169 - 176
- [25] Mitochondrial diseases: still a difficult diagnosis MEDICINA CLINICA, 2000, 114 (04): : 139 - 140
- [29] HPV vaccination is still difficult to implement MEDECINE ET MALADIES INFECTIEUSES, 2014, 44 (07): : 289 - 291
- [30] OSTEOID OSTEOMA - STILL A DIFFICULT PROBLEM BRITISH JOURNAL OF CLINICAL PRACTICE, 1984, 38 (02): : 68 - 71