function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Malicky, Hans', 1],
    ['Maneechan, Witwisitpong & Kruttha, Phassawat & Prommi, Taeng On', 1],
    ['Mey, Wolfram & Malicky, Hans', 5],
    ['Oláh, J. & Johanson, K. A.', 9],
    ['Oláh, J. & P. C & Malicky, H.', 46],
    ['Pandher, Manpreet Singh & Kaur, Simarjit & Garima, Deepti', 1],
    ['Zhang, Ao & Zhou, Xin', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=65)',
    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);