Differences between HFR (gray) and BHD (light gray) of PCS (side a) and MCS (side b) in each of eight items of SF-36 questionnaire. Abbreviations: PF: Physical functioning; RP Role Physical; BP: Bodily Pain; GH: General Health; VT: Vitality; SF: Social Functioning; RE: Role Emotional; MH: Mental Health; PCS: Physical Composite Score; MCS: Mental Composite Score