function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Clark, Paul F. & Ng, Peter K. L. & Fransen, Charles H. J. M.', 3],
    ['Dong, Dong & Li, Xinzheng', 1],
    ['Ferreira, Luciane Augusto De Azevedo', 2],
    ['Ferreira, Luciane Augusto De Azevedo & Anker, Arthur', 1],
    ['Ferreira, Luciane Augusto de Azevedo & Tavares, Marcos', 2],
    ['Mantelatto, Fernando L. & Miranda, Ivana & Vera-Silva, Ana L.', 1],
    ['Naderloo, Reza & Türkay, Michael', 3],
    ['Osawa, Masayuki', 1],
    ['Silambarasan, Krishnan & Kar, Annada Bhusan', 1],
    ['Werding, Bernd & Hiller, Alexandra', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=16)',
    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);