Medical Rescuers’ Occupational Health During Covid-19: Contribution of Coping and Emotion Regulation on Burnout, Trauma and Post-Traumatic Growth [A Saúde Ocupacional dos Profissionais do Pré-Hospitalar Na Covid-19: Contributo do Coping e Regulação Emocional No Burnout, Trauma e Crescimento Pós-Traumático]