A 35 year old office worker presents with a 1 week history of dizzy spells upon waking where the room is spinning around her for several minutes. She has also noticed that this happens when she looks upwards and gets bowls from a high up shelf. There is no hearing loss, tinnitus or otalgia. Tympanic membranes are normal on examination and cranial nerves intact.
Based on the likely diagnosis, which one of the following would not be a risk factor in her history?