function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Broun, Thomas', 1],
    ['Huber, Barbara & Gubelmann, Päivi & Büche, Boris', 2],
    ['Otero, Jose Carlos & Benyahia, Yousra & Brustel, Herve', 2],
    ['Reike, Hans-Peter & Bukejs, Andris & Arlt, Tobias', 2],
    ['Reike, Hans-Peter Dr.', 3],
    ['Rücker, Wolfgang H.', 1],
    ['V, Alexey & V, Alexander & Barševskis, Arvids', 1],
    ['Webster, Reginald P. & Sweeney, Jon D. & DeMerchant, Ian', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=13)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);