Nils Johan Hugo Westermark (September 9, 1892 – January 24, 1980) was a

Swedish Swedish or ' may refer to: Anything from or related to Sweden, a country in Northern Europe. Or, specifically: * Swedish language, a North Germanic language spoken primarily in Sweden and Finland ** Swedish alphabet, the official alphabet used by ...

sailor A sailor, seaman, mariner, or seafarer is a person who works aboard a watercraft as part of its crew, and may work in any one of a number of different fields that are related to the operation and maintenance of a ship. The profession of the s ...

who competed in the

1912 Summer Olympics The 1912 Summer Olympics ( sv, Olympiska sommarspelen 1912), officially known as the Games of the V Olympiad ( sv, Den V olympiadens spel) and commonly known as Stockholm 1912, were an international multi-sport event held in Stockholm, Sweden, be ...

. He later became a radiologist, and described the

Westermark sign In chest radiography, the Westermark sign is a sign that represents a focus of oligemia (hypovolemia) (leading to collapse of vessel) seen distal to a pulmonary embolism (PE). While the chest x-ray is normal in the majority of PE cases, the Westerm ...

. He was a crew member of the Swedish boat ''Sans Atout'', which won the silver medal in the 8 metre class.

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1892 births 1980 deaths Swedish male sailors (sport) Sailors at the 1912 Summer Olympics – 8 Metre Olympic sailors for Sweden Olympic silver medalists for Sweden Olympic medalists in sailing Medalists at the 1912 Summer Olympics {{Sweden-yachtracing-bio-stub