function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['García-Díez, Teresa & González-Fernández, José E.', 8],
    ['Geniez, Philippe & Sá-Sousa, Paulo & Guillaume, Claude P.', 3],
    ['Kaliontzopoulou, Antigoni & Carretero, Miguel A.', 1],
    ['Oskyrko, Oleksandra & Jablonski, Daniel', 1],
    ['Pinho, Catarina & Kaliontzopoulou, Antigoni & Ferreira, Carlos A', 1],
    ['Renoult, Julien P. & Geniez, Philippe & Bacquet, Paul', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=15)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);