function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Angus, Robert B & Sadílek, David & Shaarawi, Fatma', 1],
    ['Archangelsky, Miguel & Rodriguez, Georgina', 1],
    ['Fikáček, Martin & Delgado, Juan A. & Gentili, Elio', 1],
    ['Fikáček, Martin & Gimmel, Matthew L.', 2],
    ['Herger, Peter & Germann, Christoph', 1],
    ['Knisch, A.', 1],
    ['Macleay, W. S.', 1],
    ['Mai, Zuqi & Hu, Jian & Minoshima, Yûsuke N. & Jia, Fenglong', 12],
    ['Mitter, Heinz', 1],
    ['Short, Andrew E. Z. & Fikáček, Martin', 6],
    ['Swezey, O. H.', 1],
    ['Wollaston, T. Vernon', 1],
    ['Xian, Chunlan & Leong, Chi Man & Luo, Jiuyang & Jia, Fenglong', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=31)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);