function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Britz, Ralf', 1],
    ['Britz, Ralf & Ali, Anvar', 1],
    ['Britz, Ralf & Ali, Anvar & Philip, Siby', 1],
    ['Britz, Ralf & Anoop, V. K. & Dahanukar, Neelesh', 1],
    ['Britz, Ralf & Kullander, Sven & Rüber, Lukas', 2],
    ['Kullander, Sven & Norén, Michael & Rahman, Md. Mizanur', 1],
    ['Kullander, Sven O. & Britz, Ralf', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=9)',
    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);