Does the Anti-Kickback Statute require proof of knowledge of federal healthcare benefits?

QUESTIONS PRESENTED I. Does the Anti-Kickback Statute, 42 U.S.C. § 13820a-7(b)(1), require the government to prove that the defendant received remuneration for referring patients who the defendant knew received federal healthcare benefits? II. Is the mere use of the internet a sufficient interstate nexus to sustain a conviction under the Travel Act, 18 U.S.C. § 1952(a)?