”Antiphospholipid syndrome - NHS Choices” 20 and 50 three to five NHS Choices (2015) Antiphospholipid syndrome (APS) (online). NHS Choices (2015) Antiphospholipid syndrome (APS) (online). three to five 20 and 50 antiphospholipid syndrome 20 and 50 nhs.uk/Conditions/Hughes-sy... three to five NHS Choices (2015) Antiphospholipid syndrome (APS) (online). Hughes syndrome 20 and 50 three to five