function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bueno, Gabriel M. & Kehlmaier, Christian', 1],
    ['El-Hawagry, Magdi & Al Dhafer, Hathal Mohammed', 8],
    ['Fachin, Diego Aguilar & Assis-Pujol, Cristiane Vieira De', 2],
    ['Fachin, Diego Aguilar & González, Christian R. & Elgueta, Mario', 2],
    ['Fachin, Diego Aguilar & Zichinelli, Marcela Maria Parada', 3],
    ['Ivkovic, Marija & Doric, Valentina & Baranov, Viktor', 1],
    ['Kahanpää, Jere', 7],
    ['Khaghaninia, S. & Kazerani, F. & Hauser, M.', 5],
    ['Mason, Franco & Rozkošný, Rudolf & Hauser, Martin', 8],
    ['Meigen, Johann Wilhelm', 2],
    ['Rozkošný, Rudolf & Vaňhara, Jaromír', 1],
    ['Sinclair, Bradley J.', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=42)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);