function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bauer, Aaron M. & Masroor, Rafaqat & Titus-Mcquillan, James', 1],
    ['Kirchhof, Sebastian & Wasonga, Victor & Mazuch, Tomáš', 1],
    ['Metallinou, Margarita & Carranza, Salvador', 1],
    ['Metallinou, Margarita & Crochet, Pierre-André', 8],
    ['Šmíd, Jiří & Moravec, Jiří & Kodym, Petr & Kratochvíl, Lukáš', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=14)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 5, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);