What is your approach to workup for an underlying disorder in a patient with bilateral hip avascular necrosis?

The approach to assessing hip osteonecrosis is to address the potential causes:

• Is there a history of antecedent trauma?
• Is there a family history of osteonecrosis?
• Is there a history of significant alcohol use?
• Is there a history of recent corticosteroid use?
• Is there a history of pancreatitis?
• Is ...