A doctor suggested that a genetic mutation or recessive genes could be the cause.
A question on some Singaporeans' minds ever since South Korea's ex-president Yoon suddenly declared martial law.
Police began investigating the man's whereabouts after his wife's body was found on 9 Dec.
The caregiver in the video is not an employee of Aseana Caregivers, it said.
Rescue personnel successfully found the shoes before sending him to the hospital.
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Locals chucked dead chickens at the croc to get it to free the woman.
The same illness took his mother's life six years ago.
Locals believe the man was in contact with an occultist due to his struggle with infertility.
Medical staff quickly restored backup oxygen to save their lives.