Bunbowsky

Can you look at this please and let me know what you think. My neurologist wrote this for me To Whom It May Concern, Mr. ________ has come to my office as a patient for his neurological and sleep condition. I am a board certified Neurologist. I am also certified and specialize in sleep medicine. Mr. ______has been diagnosed with obstructive sleep apnea (OSA). I am currently treating him for this diagnosis. Mr. _______ with confirmed OSA diagnosis treated with positive airway pressure therapy (CPAP). It is possible,or at least than not (50% or greater probability) that OSA is associated with or due to service-connected PTSD diagnosis. However, a direct casual relationship cannot be definitely ascertained. If there is any questions or concerns, please feel free to contact me in my office. Sincerely, My question is? Is this a valid nexus letter?