function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Araújo, Diogo & Alves, Marccus', 1],
    ['Bariche, Michel & Fricke, Ronald', 1],
    ['DeFilipps, Robert A. & Krupnick, Gary A.', 1],
    ['Jarvis, Charlie', 2],
    ['Nardo, J. D.', 1],
    ['Schlechter, Fridrich Richard Rudolf', 1],
    ['Thiele, Friedrich Leopold & West, Judith Gay', 1],
    ['Wagner, Maximilian & Kovac, Marcelo & Koblmüller, Stephan', 6],
    ['Zhou, Ya-Dong & Mwachala, Geoffrey & Hu, Guang-Wan', 1]
  ]);
  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);