function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Gunton, Laetitia M. & Kupriyanova, Elena K. & Alvestad, Tom', 1],
    ['Jimi, Naoto & Fujimoto, Shinta & Ogawa, Akito', 2],
    ['Magalhães, Wagner F. & Bailey-Brock, Julie H.', 4],
    ['Salazar-Vallejo, Sergio I. & Zhadan, Anna E.', 9],
    ['Thiel, Daniel & Purschke, Günter & Böggemann, Markus', 1],
    ['Zamora, José Luis & Parapar, Julio & Helgason, Gudmundur V.', 2],
    ['Zhadan, Anna & Atroshchenko, Margarita', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=21)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);