function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Akrami, Mohammad Ali', 1],
    ['Arun, A. & Ramani, N.', 3],
    ['Beck, L. & Woas, S.', 1],
    ['Behan-Pelletier, Valerie M. & Lindo, Zoë', 1],
    ['Murvanidze, Maka & Cilbircioğlu, Cihan & Özdemir, Esengül', 1],
    ['Murvanidze, Maka & Mumladze, Levan', 2],
    ['Oliveira, Anibal R. & Argolo, Poliane S. & De, Gilberto J.', 3],
    ['Revelo-Tobar, Harol', 1],
    ['Schatz, H. & Hofstätter, S.', 1],
    ['Schatz, Heinrich', 1],
    ['Schatz, Heinrich & Fortini, Lorenzo & Fusco, Tommaso', 1],
    ['Weigmann, G. & Miko, L.', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=18)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);