function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Jůzová, Kateřina & Nakase, Yuta & Straka, Jakub', 1],
    ['Kirby, William', 1],
    ['Straka, Jakub & Alqarni, Abdulaziz S. & Juzova, Katerina', 1],
    ['Straka, Jakub & Juzova, Katerina & Batelka, Jan', 4],
    ['Straka, Jakub & Jůzová, Kateřina & Nakase, Yuta', 69],
    ['Swezey, O. H.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=77)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);