| http://www.w3.org/ns/prov#value | - If there is a persistent leak the headache can be severe.There is a slight risk of infection because the needle breaks the skin???s surface, providing a possible portal of entry for bacteria.A temporary pain or numbness to the legs or lower back pain may be experienced.There is a risk of bleeding in the spinal canal.Should there be increased pressure or swelling in the brain before the procedure,
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