function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Broadley, Adam & Kauschke, Ellen & Mohrig, Werner', 3],
    ['Menzel, Frank & Gammelmo, Oivind & Olsen, Kjell Magne', 11],
    ['Menzel, Frank & Salmela, Jukka & Vilkamaa, Pekka', 1],
    ['Menzel, Frank & Smith, Jane E. & Chandler, Peter J.', 20],
    ['Mohrig, Werner & Kauschke, Ellen & Broadley, Adam', 14],
    ['Mohrig, Werner & Menzel, Frank', 3],
    ['Rudzinski, H. - G.', 2],
    ['Shin, Seunggwan & Menzel, Frank & Heller, Kai & Lee, Heungsik', 7],
    ['Telfer, Angela C & Young, Monica R & Quinn, Jenna & Perez, Kate', 1],
    ['Winnertz, Johannes', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=63)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);