function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Barabanov, Andrei & Milto, Konstantin', 1],
    ['Ivanov, Martin & Čerňanský, Andrej & Bonilla-Salomón, Isaac', 2],
    ['Jablonski, Daniel & Khalili, Faizurrahman & Masroor, Rafaqat', 1],
    ['Jablonski, Daniel & Ribeiro-Junior, Marco Antonio & Meiri, Shai', 1],
    ['Loreal, Erwan & Syromyatnikova, Elena V. & Danilov, Igor G.', 1],
    ['Ma‛ayan Lev, Dani Nadel, Mina Weinstein-Evron & Reuven Yeshurun', 1],
    ['Rage, Jean-Claude & Bailon, Salvador', 1],
    ['Šmíd, Jiří & Moravec, Jiří & Kodym, Petr & Kratochvíl, Lukáš', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=9)',
    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);