function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Callmander, Martin W. & Tripp, Erin A. & Phillipson, Peter B.', 1],
    ['Daniel, Thomas F.', 1],
    ['Daniel, Thomas F. & Manzitto-Tripp, Erin A. & Ezcurra, Cecilia', 1],
    ['Jarvis, Charlie', 8],
    ['Navia, Denise & Duarte, Mercia Elias & Flechtmann, Carlos H. W.', 1],
    ['Silva, Marcos José Da', 3],
    ['Verloove, Filip', 1],
    ['Wijnands, Dirk Onno & Heniger, Johannes & Veldkamp, Jan Frederik', 1],
    ['Zhou, Ya-Dong & Mwachala, Geoffrey & Hu, Guang-Wan', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=18)',
    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);