A clinical Guideline, for the Diagnosis and Management of Paget’s Disease of Bone in Adults, was commissioned by the Paget's Association and published in 2019, in the Journal of Bone and Mineral Research. It has been endorsed by the European Calcified Tissues Society, the International Osteoporosis Foundation, the American Society of Bone and Mineral Research, the Bone Research Society (UK), and the British Geriatric Society. 

You can download a summary of the Guideline here.