title: Ethical problems in invasive clinical research.
authors: Andrzej
authors: A
authors: Grzybowski
authors: Robert
authors: R
authors: Sade
authors: Bebe
authors: B
authors: Loff
mesh_terms: D035843:Biomedical Research; D001794:Blood Pressure / Q000502:physiology; D015170:Cerebrospinal Fluid Pressure / Q000502:physiology*; D004992:Ethics, Medical; D005902:Glaucoma, Open-Angle / Q000209:etiology / Q000503:physiopathology*; D006801:Humans; D019585:Intracranial Hypotension / Q000503:physiopathology*; D007429:Intraocular Pressure / Q000502:physiology*; D009901:Optic Nerve Diseases / Q000209:etiology / Q000503:physiopathology*; D013129:Spinal Puncture; D014794:Visual Fields / Q000502:physiology