title: The halo sign during a percutaneous nephrolithotomy puncture.
authors.affiliation: NU Hospitals, Karnataka, India.
authors.forename: M G
authors.initials: MG
authors.lastname: Pradeepa
authors.affiliation: NU Hospitals, Karnataka, India.
authors.forename: Maneesh M
authors.initials: MM
authors.lastname: Sinha
authors.affiliation: NU Hospitals, Karnataka, India.
authors.forename: Krishnaprasad
authors.initials: K
authors.lastname: Tyagi