[1] Univ Porto, Inst Saude Publ, Porto, Portugal
[2] Escola Super Enfermagem Porto, Rua Dr Antonio Bernardino de Almeida, P-4200072 Porto, Portugal
[3] Univ Porto, NursID CINTESIS Ctr Hlth Technol & Serv Res, Porto, Portugal
[4] Univ North Carolina Chapel Hill, Sch Nursing, Chapel Hill, NC USA
[5] Univ North Carolina Chapel Hill, Carolina Ctr Genome Sci, Chapel Hill, NC USA