function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Baraniak, Edward & Walczak, Urszula', 1],
    ['Borges, Paulo A. V. & Gaspar, Clara', 2],
    ['Butler, Arthur G.', 1],
    ['Gershenson, Z. S.', 1],
    ['Lee, Ga-Eun & Lee, Yeong-Don & Liu, Tengteng', 3],
    ['Liu, Tengteng & Wang, Shuxia & Li, Houhun', 67],
    ['Pérez Santa-Rita, Jose V. & Baixeras, Joaquin & Karsholt, Ole', 2],
    ['Sohn, Jae-Cheon & Davis, Donald R. & Lopez-Vaamonde, Carlos', 2],
    ['Weidlich, Michael', 1],
    ['Wieser, Christian', 1],
    ['Zeller, Philipp Christoph', 1],
    ['[DUPLICATE RECORD!] Butler, Arthur G.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=83)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);