function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bastin, Saskia & Burckhardt, Daniel & Reyes-Betancort, Alfredo', 2],
    ['Cho, Geonho & Burckhardt, Daniel & Lee, Seunghwan', 13],
    ['DROHOJOWSKA, Jowita & KLASA, Anna', 2],
    ['Halbert, Susan E. & Burckhardt, Daniel', 15],
    ['Lashkari, Mohammadreza & Burckhardt, Daniel', 2],
    ['Malenovský, Igor & Lauterer, Pavel & Labina, Eugenia', 5],
    ['Ouvrard, David & Burckhardt, Daniel & Cocquempot, Christian', 1],
    ['Percy, Diana M. & Rung, Alessandra & Hoddle, Mark S.', 6],
    ['Seljak, Gabrijel & Malenovský, Igor', 1],
    ['Spodek, Malkie & Burckhardt, Daniel & Freidberg, Amnon', 7]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=54)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);