What follows is an opinion from the Supreme Court of the United States. Your task is to identify the disposition of the case, that is, the treatment the Supreme Court accorded the court whose decision it reviewed. The information relevant to this variable may be found near the end of the summary that begins on the title page of each case, or preferably at the very end of the opinion of the Court. For cases in which the Court granted a motion to dismiss, consider "petition denied or appeal dismissed". There is "no disposition" if the Court denied a motion to dismiss.

Opinion:
AMERICAN MEDICAL ASSOCIATION et al. v. FEDERAL TRADE COMMISSION
No. 80-1690.
Argued January 11, 1982
Decided March 23, 1982
Newton N. Minow argued the cause for petitioners. With him on the briefs were Jack R. Bierig, David W. Carpenter, William J. Doyle, and Linda L. Randell.
Howard E. Shapiro argued the cause for respondent. With him on the brief were Solicitor General Lee, Assistant Attorney General Baxter, Deputy Solicitor General Shapiro, Elliott Schulder, March Coleman, and L. Barry Costilo
Peter M. Sfikas filed a brief for the American Dental Association as amicus curiae urging reversal.
A brief for the’ State of Ohio et al. as amici curiae urging affirmance was. filed by William J. Brown, Attorney General of Ohio, and Eugene F. McShane, Charles.D. Weller, and Clifton E. Johnson, Assistant Attorneys General; Robert K. Corbin, Attorney General of Arizona; J. D. MacFarlane, Attorney General of Colorado, and Thomas P. McMahon, Assistant Attorney General; Carl R. Ajello, Attorney General of Connecticut, and Robert M. Larger and John R. Lacey, Assistant Attorneys General; Thomas J. Miller, Attorney General of Iowa, and John R. Perkins, Assistant Attorney General; Stephen H. Sachs, Attorney General of Maryland, and Charles 0. Monk II and Naomi F. Samet, Assistant Attorneys General; Warren Spannaus, Attorney General of Minnesota, and Stephen P. Kilgrijf, Special Assistant Attorney General; Paul L. Douglas, Attorney General of Nebraska, and Dale A. Comer, Assistant Attorney General; JejfBingaman, Attorney General of New Mexico, and James J. Wechsler and Richard H. Levin, Assistant Attorneys General; Robert Abrams, Attorney General of New York, and Lloyd Constantine, Assistant Attorney General; Rufus L. Edmisten, Attorney General of North Carolina, H. A. Cole, Jr., Special Deputy Attorney General, and Fred R. Gamin, Assistant Attorney General; Leroy S. Zimmerman, Attorney General of Pennsylvania, and Carl S. Hisiro, Deputy Attorney General; Dennis J. Roberts II, Attorney General of Rhode Island, and Patrick J. Quinlan, Special Assistant Attorney General; and Chauncey H. Browning, Attorney General of West Virginia, and Charles G. Brown, Deputy Attorney General.
Per Curiam.
The judgment is affirmed by an equally divided Court.
Justice Blackmun took no part in the consideration or decision of this case.

Question: What is the disposition of the case, that is, the treatment the Supreme Court accorded the court whose decision it reviewed?

Choices:
stay, petition, or motion granted
affirmed (includes modified)
reversed
reversed and remanded
vacated and remanded
affirmed and reversed (or vacated) in part
affirmed and reversed (or vacated) in part and remanded
vacated
petition denied or appeal dismissed
certification to or from a lower court
no disposition

Answer: 1