What is the role of nuclear medicine imaging modalities (three‐phase bone scintigraphy, bone marrow scintigraphy, white blood cell (WBC) scintigraphy [with 99mTc or 111In], anti‐granulocyte monoclonal antibody scintigraphy and fluorodeoxyglucose‐positron emission tomography/computed tomography (FDG‐PET/CT) scan in diagnosing periprosthetic joint infection (PJI)?