- As part of the neurological examination, the investigator must also conduct the procedures specified in the Standardised Evaluation of Pain [Neuropathic Pain] (StEP) instrument [Scholz, 2009]2, and to calculate the total score. In the clinical opinion of the investigator, the diagnosis of lumbosacral radiculopathy should be supported by at least one of the following features at Screening or documented in the medical notes in relation to the current symptoms: