If the imaging is normal, some patients may respond to injections. Some patients may respond to bracing. Some patients may respond to physical therapy. Some patients may respond to Chiropractic, some patients may respond to nerve stimulation. Some patients may respond to tens units. Notice that I’ve used the same language for all of those. And the reason is is that some patients is this small amount of patients who respond to each one of those, but we don’t really have anything that tells us what will predict the response of each individual patient to each of those individual scenarios. And so it can be tough and it can be enormously frustrating for the patients because here they go from one thing to the next, looking for the holy grail to make their back pain better when indeed medicine may only be able to take a chunk out of it with one thing or another, and not actually as people would want curate. So it can be enormously tough.