function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Barševskis, Arvīds & Janovska, Marina & Aksjuta, Kristīna', 3],
    ['Cebeci, Hüseyin & Özdikmen, Hüseyin & Turgut, Semra', 2],
    ['Chapman, Eric G. & Richards, Austin B. & Dupuis, Julian R.', 1],
    ['Fabricius, Johann Christian', 2],
    ['Gupta, Rajeev & Vitali, Francesco', 1],
    ['Ilić, Nastas & Ćurčić, Srećko', 1],
    ['Motschulsky, Victor de', 1],
    ['Schrank, Franz von Paula', 1],
    ['Weber, Friedrich', 1],
    ['Webster, Reginald P. & Alderson, Chantelle A.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=14)',
    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);