function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Aistleitner, Eyjolf & Behounek, Gottfried & Hoppe, Henri', 1],
    ['Dubatolov, V. V. & Zinchenko, V. K & Ustjuzhanin, P. Ya.', 1],
    ['Karisch, T.', 1],
    ['Kim, Ok-Kyung & Ishikawa, Tadashi & Yamada, Yoshihiro', 2],
    ['Komal, J. & Shashank, P. R. & Sondhi, Sanjay & Madan, Sohail', 1],
    ['Ronkay, Laszlo & Behounek, Gottfried & Müller, Günter C.', 1],
    ['Wymann, Hans-Peter', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=8)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);