function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bailon, Salvador', 1],
    ['Crochet, Pierre-André & Geniez, Philippe & Ineich, Ivan', 3],
    ['Heidari, Nastaran & Pouyani, Nasrullah Rastegar', 1],
    ['Miralles, Aurélien & Geniez, Philippe & Beddek, Menad', 2],
    ['Mozaffari, Omid & Mohammadi, Sima & Saberi-Pirooz, Reihaneh', 2],
    ['Segniagbeto, Gabriel Hoinsoude & Trape, Jean-François', 1],
    ['Tamar, Karin & Geniez, Philippe & Brito, José C.', 2],
    ['Šmíd, Jiří & Moravec, Jiří & Kodym, Petr & Kratochvíl, Lukáš', 8]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);