@misc{indiciaec65d284dc559,
  title = {A physical activity questionnaire for the elderly.},
  author = {L E Voorrips and A C Ravelli and P C Dongelmans and P Deurenberg and W A Van Staveren},
  year = {1991},
  url = {https://pubmed.ncbi.nlm.nih.gov/1956274/},
  note = {Source identifier: 1956274}
}