947
Epidemiological research should develop rationally and aim at identifying more accurate risk factors , taking into account the mechanisms responsible for proximal femur fractures : fall , lack of cushioning and protection during the fall , and bone fragility .
 Anatomy: femur; Anatomy: bone
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Anatomy 
Text: {0} 
Answer:
 Anatomy: femur; Anatomy: bone