{
  "abstract": "We thank Lee and Gau for their methodological comments regarding our observational study, which prompted a careful discussion.1 2 The authors raise three main points: variable dichotomization, residual confounding due to frailty, and the possible mediating effect of intraoperative fentanyl.",
  "authors": [
    {
      "affiliations": [
        "Department of Anesthesiology, Fayoum University Faculty of Medicine, Fayoum, Egypt"
      ],
      "name": "Mahdy Ahmed Abdelhady"
    },
    {
      "affiliations": [
        "Department of Anesthesiology, Fayoum University Faculty of Medicine, Fayoum, Egypt"
      ],
      "name": "Maged Labib Boulos"
    },
    {
      "affiliations": [
        "Department of Anesthesiology, Fayoum University Faculty of Medicine, Fayoum, Egypt"
      ],
      "name": "Mohamed Ahmed Hamed"
    },
    {
      "affiliations": [
        "Department of Anesthesiology, Fayoum University Faculty of Medicine, Fayoum, Egypt"
      ],
      "name": "Doha Hamad Masry"
    },
    {
      "affiliations": [
        "Department of Anesthesiology, Fayoum University Faculty of Medicine, Fayoum, Egypt"
      ],
      "name": "Safaa Gaber Ragab"
    },
    {
      "affiliations": [
        "Department of Anesthesiology, Fayoum University Faculty of Medicine, Fayoum, Egypt"
      ],
      "name": "Mohamed Hasan Ragab"
    }
  ],
  "title": "Author’s reply to: \"Interpreting the link between vitamin D deficiency and postoperative pain after breast cancer surgery\"",
  "uid": "4db71f5e-d40b-5e5f-9b91-89b3bda20b99"
}