Can US citizens use Bitflex?

Excuse me, could you please clarify for me if US citizens are permitted to utilize the services provided by Bitflex? I've been hearing a lot about this cryptocurrency exchange platform and its various offerings, but I'm not entirely sure if it's accessible to individuals residing in the United States. It would be greatly appreciated if you could shed some light on this matter and provide me with any relevant information or restrictions that might apply. Thank you in advance for your assistance.