function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Babytskiy, A. I. & Bezsmertna, O. O.', 1],
    ['Babytskiy, A. I. & Zuieva, O. A. & Bezsmertna, O. O.', 5],
    ['Broadley, Adam & Kauschke, Ellen & Mohrig, Werner', 6],
    ['Bächli, Gerhard & Merz, Bernhard & Haenni, Jean-Paul', 7],
    ['Menzel, Frank & Gammelmo, Oivind & Olsen, Kjell Magne', 20],
    ['Menzel, Frank & Smith, Jane E. & Chandler, Peter J.', 56],
    ['Mohrig, Werner & Kauschke, Ellen & Broadley, Adam', 4],
    ['Telfer, Angela C & Young, Monica R & Quinn, Jenna & Perez, Kate', 5],
    ['Vilkamaa, Pekka & Hippa, Heikki', 7],
    ['Vilkamaa, Pekka & Hippa, Heikki & Heller, Kai', 6],
    ['Vilkamaa, Pekka & Menzel, Frank', 4],
    ['Winnertz, Johannes', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=125)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);