function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Geraads, Denis & Spassov, Nikolaï & Hristova, Latinka', 1],
    ['Güleç, Erksin Savaş & Sevim, Ayla & Pehlevan, Cesur', 1],
    ['Kostopoulos, D. S. & Spassov, N. & Kovachev, D.', 1],
    ['Liu, Liping & Kostopoulos, Dimitris S. & Fortelius, Mikael', 1],
    ['Made, Jan Van Der & Güleç, Erksin & Erkman, Ahmet Cem', 1],
    ['Tesakov, Alexey S. & Titov, Vadim V. & Simakova, Alexandra N.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=6)',
    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);