function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Chattová, Barbora & Lebouvier, Marc & Haan, Myriam De', 5],
    ['Ferreira da Silva, Juliana & Oliveira, Maria Angélica', 1],
    ['Kopalová, Kateŕina & Nedbalová, Linda & Haan, Myriam De', 5],
    ['Rybak, Mateusz & Czarnota, Pawel & Noga, Teresa', 2],
    ['Rybak, Mateusz & Kochman-Kedziora, Natalia & Peszek, Lukasz', 3],
    ['Rybak, Mateusz & Peszek, Lukasz & Luthfi, Oktiyas Muzaky', 5],
    ['Rybak, Mateusz & Peszek, Łukasz & Skoczylas, Łukasz', 1],
    ['Rybak, Mateusz & Witkowski, Andrzej & Peszek, Lukasz', 8],
    ['Shea, Rachel & Greifenstein, Jeremy & Kociolek, J. P.', 1],
    ['Zidarova, Ralitsa & Levkov, Zlatko & Vijver, Bart Van De', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=35)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);