function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bailon, Salvador', 1],
    ['Barabanov, Andrei & Milto, Konstantin', 2],
    ['Barabanov, Andrei V. & Doronin, Igor V.', 1],
    ['Daudin, F. M.', 1],
    ['Ivanov, Martin & Čerňanský, Andrej & Bonilla-Salomón, Isaac', 1],
    ['Klembara, Jozef & Čerňanský, Andrej', 1],
    ['Rage, Jean-Claude & Bailon, Salvador', 1],
    ['Venczel, Márton & Stiuc, Emanoil', 1],
    ['Vianey-Liaud, Monique & Comte, Bernard & Marandat, Bernard', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=10)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);