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*Correspondence: Agata Blazewicz, [email protected] Disclaimer All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers

Get in touch with our team to discuss your project or place an order today: References: Kleinman HK, Sosne G

Early warning signs include persistent fatigue that does not improve with rest, difficulty concentrating or brain fog, tingling or numbness in hands and feet, weakness in the legs, dizziness when standing up, pale or yellowish skin, and a sore or swollen tongue