function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bächli, Gerhard & Merz, Bernhard & Haenni, Jean-Paul', 1],
    ['Graciolli, Gustavo', 2],
    ['Nartshuk, E. P. & Matyukhin, A. V. & Shokhrin, V. P.', 2],
    ['O’Hara, James E. & Cerretti, Pierfilippo & Pape, Thomas', 1],
    ['Reeves, Will K. & Durden, Lance A. & Ritzi, Christopher M.', 1],
    ['Rondani, Camillo', 1],
    ['Sforzi, Alessandra & Sommaggio, Daniele', 1],
    ['Sinclair, Bradley J. Dr.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=10)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);