Atraumatic (pencil-point) versus conventional needles for lumbar puncture: a clinical practice guideline. (22nd May 2018) - Rochwerg, Bram; Almenawer, Saleh A; Siemieniuk, Reed A C; Vandvik, Per Olav; Agoritsas, Thomas; Lytvyn, Lyubov; Alhazzani, Waleed; Archambault, Patrick; D'Aragon, Frederick; Farhoumand, Pauline Darbellay; Guyatt, Gordon; Laake, Jon Henrik; et al.