Patients first receive a course of chemotherapy.

and with likely damage to the central nervous system.and warned in the medical records about the health risks of future exposures.

and Canadian diplomats unprecedented Wednesday afternoon.The State Department has yet to identify a definitive source of the attacks and Cuba has denied any involvement.which they described as responsive.

diplomats working in Havana were diagnosed with conditions as serious as mild traumatic brain injury.there are other cases with other diplomats involved.

They complained of symptoms including hearing loss.

The department declined to comment on the exact medical condition or number of diplomats affected.The Navy has ordered an operational pause for its fleets worldwide to make sure all steps are being taken to ensure safe and effective operations.

Singapores government said the area for a sea-based search more than doubled Wednesday to about 2.The family of Jacob Drake of Ohio was told he was among the missing.

Several navies continue to search seas east of Singapore where the collision happened early Monday.Malaysia and Indonesia for helping in the search for the missing McCain sailors.