function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Archibald, J. David & Averianov, Alexander', 2],
    ['Hunter, Erich', 1],
    ['Jepsen, Glenn L.', 1],
    ['Lofgren, Donald & Mckenna, Malcolm & Honey, James', 1],
    ['Matthew, W. D. & Granger, W.', 2],
    ['Muizon, Christian de & Billet, Guillaume & Argot, Christine', 2],
    ['Scott, Craig & Spivak, Daniel N. & Sweet, Arthur R.', 1],
    ['Silcox, Mary T. & Bloch, Jonathan I. & Boyer, Doug M.', 1],
    ['Simpson, George Gaylord', 1],
    ['Suarez, Catalina & Forasiepi, Analia M. & Babot, María Judith', 2],
    ['Wible, JR & Rougier, GW & Novacek, MJ & Asher, RJ', 6]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);