function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Azadbakhsh, Saeed & Nozari, Jamasb', 1],
    ['Chapman, Anna Nicola', 2],
    ['Hristovski, Slavčo & Guéorguiev, Borislav', 12],
    ['Lohaj, Roman & Guéorguiev, Borislav & Dubault, Gérard', 10],
    ['Ćurčić, Srećko & Ilić, Nastas & Vesović, Nikola & Antić, Dragan', 2],
    ['Ćurčić, Srećko B. & Waitzbauer, Wolfgang & Zolda, Pamela', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=28)',
    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);