function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Hansen, Hans Jacob', 2],
    ['Iannilli, Valentina & Berera, Raffaella & Cottarelli, Vezio', 1],
    ['Iannilli, Valentina & Vonk, Ronald', 1],
    ['Rodriguez, Marianela & Armendáriz, Laura C.', 2],
    ['Rubal, Marcos & Larsen, Kim', 1],
    ['Senna, André R. & Serejo, Cristiana S.', 1],
    ['Shimomura, Michitaka & Ohtsuka, Susumu & Tomikawa, Ko', 1],
    ['Vonk, R. & Jaume, D.', 1],
    ['Vonk, Ronald & Jaume, Damia', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=11)',
    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);