function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Cosel, Rudo von', 2],
    ['Gerdes, Klaas & Kihara, Terue Cristina & Martinez Arbizu, Pedro', 1],
    ['Johnson, Shannon & Won, Yong-Jin & Harvey, Julio', 1],
    ['Kiel, Steffen & Aguilar, Yolanda M. & Kase, Tomoki', 2],
    ['Kiel, Steffen & Campbell, Kathleen A. & Gaillard, Christian', 2],
    ['Kiel, Steffen & Fernando, Allan Gil S. & Magtoto, Clarence Y.', 1],
    ['Saether, Kristian P. & Little, Crispin T. S.', 2],
    ['Tunnicliffe, Verena & Breusing, Corinna', 1],
    ['von Cosel, Rudo & Janssen, Ronald', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=15)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);